# CF407

Source: https://xmlvalid.com/rules/CF407

> Enter valid TTX registration number - …: letters, digits and dashes only, or NA.

- Level: error
- Rule sets: MyInvois validations of LHDN (Malaysia) MyInvois SDK of 25 September 2026
- Context: `/*/cac:AccountingSupplierParty/cac:Party | /*/cac:AccountingCustomerParty/cac:Party`
- Test: `every $t in $ttx satisfies matches(normalize-space($t), '^(NA|[A-Za-z0-9-]+)$')`

Validate a document against these rules: https://xmlvalid.com/validate